The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 2007
Filed:
Apr. 10, 2002
Applicants:
Stanley S. Toncich, San Diego, CA (US);
Raymond Curtis Wallace, San Diego, CA (US);
Inventors:
Stanley S. Toncich, San Diego, CA (US);
Raymond Curtis Wallace, San Diego, CA (US);
Assignee:
Kyocera Wireless Corp., San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a phase shifting filter and a phase compensating direct downconversion receiver. A DC offset detector detects a DC offset in a received baseband signal and provides a feedback signal. A tunable filter phase shifts a local oscillator signal responsive to the feedback signal. The phase-shifted local oscillator signal is used to directly downconvert a received RF signal, whereby DC offset in the resulting baseband signal is reduced.